Ferrous acetate sulphate

Besides Fe-, other reducing agents that may be used in conjunction with H2O2 are aliphatic amines, Na2S203 thiourea, ascorbic acid, glyoxal, sulfuric acid, NaHSOs, sodium nitrite, ferric nitrate, peroxidase, AgNOs, tartaric acid, hydroxylamine, ethylene sulfate, sodium phosphite, formic acid, ferrous ammonium sulphate, acetic acid, ferrous sulphate, and HNO2, etc,... 

Ally I acetate [591-87-7] M 100.1, b 103°, d 0.928, n4 1.40488, nD27 1.4004. Freed from peroxides by standing with crystalline ferrous ammonium sulphate, then washed with 5% NaHCC, followed by saturated CaCl2 soln. Dried with Na2S04 and fractionally distd in an all-glass apparatus. 

At 60° C. the relative rates of oxidation of ferrous chloride, sulphate, and acetate, are as follow —1 10 100. The oxidation appears to depend upon the un-ionised portion of the dissolved salt.6... 

The process can be used to immobilize heavy metals such as Cd, Zn, Cu, Pb, Ni and Co. Cr(VI) can be reduced by some metal-reducing bacteria to the less toxic and less soluble form Cr(III). Arsenate [As(V)] can be reduced to the more mobile arsenite [As(III)] which precipitates as AS2S3, and is insoluble at low pH. Several laboratory-scale tests (batch and column) are currently available to study the feasibility of this process. However, only a few field tests have been performed to date. Two such tests have been conducted in Belgium, one at a non-ferrous industrial site, where the groundwater was contaminated with Cd, Zn, Ni and Co, and the other which was treated by injection of molasses in order to reduce chromium (VI) to chromium (III). A third demonstration in The Netherlands has been performed at a metal surface treatment site contaminated by Zn. The outcomes of a batch test of a groundwater heavily contaminated by Zn, Cd, Co and Ni are presented in Table 5. The initial sulphate concentration was 506mg/l. With the addition of acetate, a nearly... 

Sulphates, Copper, and Alkalies. — Boil for a few minutes a solution of 5 gm. of ferrous chloride in 10 cc. of water and 5 cc. of nitric acid (sp. gr. 1.3), dilute to 120 cc., add 20 cc. of ammonia water, and filter evaporate 50 cc. of the filtrate and ignite the residue. The weight of the latter should not exceed 0.001 gm. Slightly acidulate 20 cc. of the filtrate with hydrochloric acid and add barium nitrate solution. No change should appear. 20 cc. of the filtrate acidified with acetic acid should show no change upon addition of potassium ferrocyanide solution. 

Colloidal ferrous arsenate has been obtained 7 in the form of an opalescent jelly by successively treating an aqueous solution of a ferrous salt with ammonium sulphate, acetic acid and an excess of sodium orthoarsenate. The jelly cannot be kept indefinitely, but crystallises after a few weeks. 

To 4 gms. (1 mol.) of mannitol dissolved in 20 c.cs. of water, a solution of 1 gm. of ferrous sulphate in cold water is added, and then gradually 12 c.cs. (1 atom of 0) of hydrogen peroxide solution (20 vols.), or more if solution is weaker, are dropped in. The solution must be well cooled throughout. Sodium carbonate solution is added till just alkaline, the whole filtered, and portions of the filtrate tested for mannose by Fehling s solution, and by ammoniacal silver nitrate. To the bulk of the filtrate 1 c.c (excess) of phenylhydrazine dissolved in a slight excess of dilute acetic acid is added, the solution allowed to stand, and the precipitate of mannose phenylhydrazone filtered off. It is recrystallised from dilute alcohol. 

Lead Acetate Paper.—Used for detecting I S, with which it gives a brown coloration. Filter paper is soaked in a solution of 5 gms. lead acetate (or nitrate) per litre, and dried in an atmosphere free from H2S. Ferrous sulphate paper may also be used for detection of H S, but does not keep. 

E. P. Alvarez 2 found that the pemitrates react with soln. of lead acetate (white precipitate), silver nitrate (white precipitate), mercurous nitrate (white precipitate with rapid decomposition), mercuric chloride (red precipitate), copper sulphate (blue precipitate), zinc and cadmium sulphates (white precipitate), bismuth nitrate (white precipitate), gold chloride (slight effervescence and escape of oxygen), manganous chloride (pink precipitate), nickelous chloride or sulphate (greenish-white precipitate), cobaltous nitrate and chloride (pink precipitate), ferrous sulphate (green or bluish-green precipitate), ferric chloride (red ferric hydroxide), and alkaline earth chlorides (white precipitates). The precipitates are all per-salts of the bases in question. 

Ferrous sulphate, 2-normal III, XI Lead acetate, 1-normal IV Litmus solution, blue III Litmus solution, red III Magnesium chloride, 1-normal P. 55, V... 

Methyl, ethyl, and propyl alcohols are oxidised by permanganate or hydrogen peroxide in the presence of ferrous salts. If ferrous sulphate is employed, the ethyl alcohol is, in dilute solution, oxidised by the permanganate to aldehyde but in the presence of ferrous oxalate the oxidation proceeds further, acetic acid resulting. Thus... 

A powder containing at least 90 per cent, of the octahydrated ferrous phosphate is obtained by mixing solutions of sodium acetate (2 parts), sodium phosphate (10 parts), and ferrous sulphate (8 parts), and allowing to stand in the absence of air for several days. The precipitate is collected on a calico filter and dried at 40° C.16 If the liquid... 

Colour Tests. To 0.2 ml add 2 ml of a 2% ferrous sulphate solution and 5 ml of dilute hydrochloric acid—green-brown to 0.2 ml add 0.5 ml of aniline and 5 ml of acetic acid—orange-red. 

Copper, Nitric Acid, etc. (Alkali Salts, Calcium). — Dilute 20 iM. of ferric chloride solution (1 1) with 100 cc. of water, fuld 25 cc. of ammonia water, and filter. On evaporating 50 cc. of the colorless filtrate and igniting the residue, the weight of the latter should not exceed 0.001 gm. On mixing 2 cc. of the filtrate with 2 cc. of concentrated sulphuric acid, and overlaying tliis mixture with 1 cc. of ferrous sulphate solution, no brown zone should form at the contact-surfaces of the two licpiids. 20 cc. of the filtrate acidulated With acetic a

potassium ferrocyanide solution. 

---